Honestly, for me it's not 75D vs 100D... but instead, I'd hold out for a Raven model within your price range. A lot of big improvements. But that's just me.
I know most people on here say to avoid the 75D... but it really all depends on your needs. For example, I have a Standard Range (Raven equivalent to a 75D). I charge to 80% daily, and I've never had range anxiety. Even after a full day of running errands all around town, I still have plenty of range. Sure, a 100D/Long Range has more range. But so far, I've never needed it. And for the rare situation where I might, there are superchargers.
If you live in a cold climate (which cuts range), or have a need to drive long distances regularly, then yes, a Long Range makes more sense. But For those of us who only drive around town and don't do road trips, Standard Range/75D is perfectly fine.