I have an ID (in Japanese with no downloads) but I'm unfamiliar with the ID L. I've seen more people sign the praises for the ID L which makes me feel as if not allot of people have or are interested in the ID. Anyway, refer to
this topic for information about ID L. Compared to that, the ID lacks seeds, parent visits, and tama pets. Some things are a little tweaked since the ID doesn't have clothes but it has accessories like hats and glasses, the restaurants have different varieties, and it is possible to visit past Tamagotchis after 5 or so TamaTomo stamps are obtained (the same as happy symbols) but only as adults with happiness filled up to the red bar. Additionally, from
this topic it appears the ID has less connectivity options than the ID L.
Speaking from experience, the ID is a pretty easy colour Tamagotchi and also has a bonus for English speakers with some of the locations named in English (such as "Convenience Store" and the "Photo" shoot/building). Unlike the past models, it has weather conditions and birthdays for the actual Tamagotchi characters. I'm assuming the two models do overlap, so count that as a plus for both version. One of my biggest complaint with the ID (which can be applied to the ID L) is that it only has two built-in games which after five or so generations get quite monotonous. I understand this can be fixed with downloads but I'd have to buy equipment or an ID station (which I was considering awhile back). Also, perhaps allot of colour tamas would significantly improve with downloads so it is a separate experience. Minorly, while I appreciate the colour graphics I feel the screensaver takes away the life that the older models had as I can no longer glance up at them and see them ambling around like living creatures.
@Jhud - I noticed you mentioned having allot of problems with posting. Have you tried previewing your post with the "More Reply Options" buttons? That usually corrects all my posting problems and also safeguards my posts.