Personally, I don't really recommend the SCDS2 for you. Since you have a Lite, and not a DSi.
GBA Emulation is quite poor in comparisment with an EZ 3-in-1. And it definitly drains your battery life more than the EZ, in combination with the Acecard.
The reasons to buy a SCDS2 for a DS-Lite with an EZ-Flash that are left:
- (Future) divx support etc. (Which will drain battery life much more, in comparisment with converted Moonshell videos)
- Better SNES emulation. (Which is not perfect now)
Other options like the in-game-cheat-menu etc. are not really that helpful, the ingame cheat-engine-thingy is not working good on most games. (Since you can not find pointers)
Compatibility etc. should be the same as Acecard/CycloDS/Wood (R4). In combination with your EZ, GBA compatibility should be (nearly) perfect. NO B&W don't work for acelard ect without patching.
Just see if the extra pricetag is worth the extra futures.