Dude ... EP is always heavier than GP till you reach around 120 size.

For planes like 40cc its usually slightly lighter. Example is the Comp ARF 2x2 Extra, was told its only about 13.5 lbs on EP but 15 lbs on gas. So the big EP planes are lighter to a point we need to sling the batts up front at the motor mounting box so that we can get the CG right. Your wing loading will be higher than GP but let's not get carried away because its probably not so much more that it makes the plane fly like a pig. You will have good power for sure.

If you want her lighter you can use 3,700 mAh packs but your flight time will be lower, that's all. To save weight you can also use lower C rated batts but please ensure it will handle the motor amp draw. My pal flies the Integral with 13C 5,300 mAh packs and they are lighter than my FP 25C 4,900 mAh packs. He has no issues at all. He has even competed with that.

In the past people were flying pattern plane like Curares, Angels, Arrows etc. Those were heavy planes (they had retracts too) with relatively lower powered engines than what we have today but they competed and they flew well. I don't think Hanno Pratner had 14 oz wing loadings back then but he is a legend. Well, the debate about lighter is better will go on ...

Just to digress a bit, new 2x2 planes as I have seen use so many weight saving stuff, e.g. small tail wheels, aluminium tubes for fuel etc. If we want to go to this extent then why not:

i. remove pilot or use sponge pilots;
ii. remove pilot headrest;
iii. use titanium screws;
iv. drill UC to lighten it;
v. drill out servo casing;
vi. use titanium pipes & header;
vii. use AAA cells for RX pack, bring multiple packs, 1 pack 1 flight
viii. use wooden props
ix. plastic spinner
x. use pylon plane wheels (you can narrow wheel pants too, less material and more aerodynamic)

See how crazy it can get? Heheheeheheee ...