I think comparisons between new and old gear are natural. I just think it's an oversimplification to make a comparison solely based on price. Your experience with the liner jacket is only half the story. The other half (experience of the Sitka piece) may not be worth the look, or it may.
My responses in red, below. Your mileage may vary:
I'm confident the Sitka will be had at about $100 more than the Wiggys. That's still a lot, but it closes the gap. If someone can get that pricing, and the garment is indeed a better fit for him/her, spending $60 on another item is not money well spent. So, at this discussion point, I'm suggesting a deeper look at what makes the garments successful or not and then the ensuing conversation of better/best value has more context for those following along. If you have an extra $100 to spend, consider trying the Wiggy's liner and spend the extra money on an additional vest liner and a pair of 13" Lamilite socks which are proven, instead of buying Sika and hoping the Marketing Department isn't, yet again, over hyping their products.
For example:
The Wiggy's liner jacket has a 3 layer construction with interior liner. The Sika has a 2 layer construction with lofted insulation on the inside. Is one better than another and why? The Wiggy's Lamilite insulation is laminated to the material so the coverage is consistent throughout the garment which equates to no cold spots. The Sika is quilted to hold the insulation in place. Every place the insulation is quilted, it is compressed by the sewing process which compresses the insulation in the stitched areas and compressed insulation equates to cold spots.
Also, the Lamilite insulation can be compressed for years and still retain it loft and insulating properties. The Sika insulation will degrade under compression, whether it is compressed by laying in a sealed tote with other clothing or whether it's compressed over the shoulders by being hung on a hanger in your closet. If you can afford to replace it every couple of years, that's fine. The fact that Wiggy's Lamilite products are used by the military for survival suits (that are vacuum sealed to compress the suit down to a small size) and are affixed to every ejection seat on jet fighters or by the Coast Guard's Victims Casualty Hypothermia Bags which are kept in compression bags until they get used, vouches for this claim. No other insulation can meet this requirement regardless what the Marketing Department says.
The Sitka has 4 way stretch, does the Wiggy's? The Wiggy's liner is generously sized so it does not fit tight against the wearer which equates to more trapped airspace which traps more heat near the body. Excessive stretch is not required. The Sika is a more form fitting, athletic cut which requires more stretch to keep from binding. The more form fitting Sika leaves less room for trapping heat next to the body.
The Sitka has a high collar, the Wiggy's has a crew neck, why does one benefit from either or? As a mid layer, a well thought out garment will not have a collar because the outer layer will have an appropriately designed collar and serious hunters like John Eberhart won't have to cut the collars off of a $300 jacket. Because the Wiggy's liner is just that, a liner it has no collar nor pockets.
The Sitka has DWR, Wiggy's a higher denier nylon. What does this mean for performance? DWR is nice until the garment has been washed a few times, then it's gone. The Wiggy's liner is just that, a liner. The outer garment is what should be repelling water during inclement weather. However, if Wiggy's Lamilite does get wet, it will still keep you warm unlike the insulation used by Sika. If you have any doubts about it, watch a few YouTube videos of guys verifying that Wiggy's sleeping bags, once totally soaked will keep you warm and comfortable in cold weather and dry quickly.
The Wiggy's has elastic cuffs, the Sitka has a stretch wrist. Is there a felt difference? Seems to me, a stretch cuff is a stretch cuff. Although the knit cuff can extend up into your glove gauntlet to seal out cold from creeping in.
$60 for Wiggy's liner jacket may equate to a better garment at a better price, but I'm interested in the details of why. I've no allegiance to either company, often root for the little guy, and am happy when our collective experience help community members get something better cheaper. Or even a nice alternative at more economical pricing. But I think it's helpful to get into the details to establish the fullest picture. I meant no offense with my post, just wondering if we moved the bar on price lower, would you be i interested in a closer inspection of the garment. It's your money, spend it on what you want. I often wonder what the advertising budget is for a company like Sika and how many high priced Advertising Agency's they use to come up with new ways to put lipstick on the same old thing to make it sound like the next big thing. I do know what Wiggy's advertising budget is, $0 unless you consider whatever it cost to keep his website up and running.