I do not notice any real temperature difference, and the cleaning is way easier / not as hard on the piece in terms of losing hair. Don't know about injected, but I don't think you can inject a .03. In terms of durability I think the V Loops are fine, provided you aren't getting it from a shitty supplier. I have 2 main suppliers, my higher quality one provides .03 that last a few months before any shedding is noticeable (almost certainly at the hairline). I have recently tried a cheaper UTS which appears to be shedding the V loops a lot faster, but I've only had it for a couple of weeks so not entirely sure yet.
Overall though, for me, skin > lace. Maybe I just didn't know how to clean the lace up properly but I would pull out at least 10 hairs through the bottom on every piece of tape i'd remove. That adds up quick