Prosmoke is a skinny little thing, probably an M403 auto battery with teensy annoying carts and no cartos available. I would not buy it. I started on M402 and M401 manual (more reasonable length and the more popular manual batteries). Nice flavor, not much hit, incredibly tiny annoying carts. I would not buy Prosmoke. If you really want to try that model buy an M401 manual elsewhere. It may keep you happy for 3-4 weeks.
Vapor4Life - a 2-piece, KR808D-1 which is the most popular and supported 2-piece. When manufacturers make new kinds of cartos, KR808D-1 is likely to be the only 2-piece model supported. This is a pretty hard hit at 24mg an even at 18mg with many flavors. If your throat gets irritated easily then I don't know if I would recommend it. You can go look at what they have available in VG cartomizers - not nearly the selection of the Premium and WOW cartos. But if you will be happy with the VG cartos and/or filling cartos with thinned VG yourself, then sure, try it.
What models were you vaping? And what eliquids were you using? For example, something like Greensmoke (KR808D-2), Bloog, Smoketip, etc - Vapor4Life will be a similar hit unless you use the VG cartos or fill your own VG cartos by thinning VG juices and filling the cartos.
I actually think you might get a softer throat experience from a manual 510 or 510 w/ mega xl batteries and use Boge blank cartomizers?