I got the Predator 1500s for Christmas, had a net last night, wore them for the majority and then my LEs just as a direct comparison.
So the differences are:
1. Price, obviously, looks about double the cost £135ish compared to £65ish.
2. Weight, the 1500s are 40g lighter per glove.
3. Protection, the LEs feel like the palms are more cushioned. I find that a good thing. Everything else is pretty much the same.
4. Quality, the leather on the back of the LEs is much better quality but that doesn't make any difference apart from maybe more weight?
In conclusion, if you don't want to spend a load the 1500s are very good gloves. If you want to treat yourself go for the LEs. I am certainly not going to wear my LEs for practice, I think the protection of the 1500s is more than enough at my level.
Annoyingly I received a load of Barrington gift vouchers for Christmas and their prices are stupidly high compared to everywhere else. I was thinking about getting another pair of LEs with them for the future, I love them that much.