Yes it matters
Ask yourself: am I a skilled and confident fabricator eager to embrace a challenge ? Would I be a little bored after doing essentially the same several tasks over and over several dozen times ? If the answer is yes, then the fuselage is the kit for you to slow build. If you can only afford to quick build one of the kits, and you are seeking the quickest, least risky path to a completed aircraft, then the wing is the kit to slow build. IMHO, the fuselage kit is much more interesting and difficult, and fun. Every step and task is new and different, and has many more opportunities to screw up in new and different ways. The wing is arguably "do the same thing over and over" many many times. The wing is not trivial either, but once you conquer a few things you just step and repeat. Slow building the fuselage is a long series of new things to discover, understand, and then conquer.