I usually only work on one game at a time and try to do my best to finish that one game first before moving on to anything else, but I’ve seen so many people around here that can work on multiple projects in a row, like our ol’ pal Kenton here, so maybe I’m just not that good when it comes to multitasking. <_<
Anyways, you should work on the one game that gives you the biggest satisfaction to work on first. I’d probably work and finish up on Lady Of The Lion first since for Enelysion II you’re planning on going the more custom route compared to LOTL that, although still uses custom materials, aren’t as painstaking as the other game. Also, we already got the first Enelysion game; there’s no immediate rush for a sequel just now.
Anyways, it’s up to you. And if you still can’t decide – you could always flip a coin. ^^