I played every fps game with the G403 for 2 years and the G PRO for 5 years, I also tried the Superlight 2 before settling on it. Before Logitech, I had the Deathadder for several years, 3k hours in csgo with the deathadder.
The only reason I went back to Razer was for the curve it makes upwards and how the thumb sits more comfortably. Purely due to palm grip with a thick palm, if you have a thick/large palm but use claw grip, the superlight 2 will be perfect.
The only difference with the g pro is the slightly fewer grams, which you notice immediately, same weight as the superlight 2, so it doesn't prevail.
Don't expect anything great from the materials, they sacrifice durability for less weight, obviously it's the selling point, so if you want something durable and weight doesn't bother you, it's not the mouse for you, the same goes for the superlight 2.
The skates it has are much better than the g pro and superlight 2, they glide more comfortably even on a control mousepad and the mouse is smoother. Even with aftermarket skates (corepad) on the g pro, I had this issue for years, it's probably the placement.
The side buttons are more durable than the g pro (and probably the superlight 2) and the clicks are more responsive.
The advertised polling rate is 8,000, but it's not true, for a higher polling rate you need to get an extra dongle from their site, which costs 44 euros with shipping. In the superlight 2, you have it out of the box, so economically it's more advantageous.
If the mouse cost 130 with the dongle, it would be ok, as it is you pay 20-30 euros more than you should, just because it's Razer and you want another 44 for the "DLC" of the polling rate.
If you don't have an issue with your grip style or have small hands and want something good available in the Greek market, then the superlight 2.
If you want something cheaper but equally good and don't mind waiting a bit, the ninjutso sora v2 that will be released in mid/late April is a much better choice than the 2 "best" in the Greek market.