Just my 2 cents:
You can't compare T05 with O7. The O7 Euro is softer, everything else harder.
My experience with T05, the for me best matching counterparts EL-P and EL-S from Tibhar and harder rubbers like Vega Pro, Omega 5 Tour and Pro and also the Fastarc G1 which is from the same generation like Vega Pro tells me that the harder rubber seem to be "less" in speed and spin. Seems because if you hit them properly more with the Asia way of playing fh with enough power from the ground, the picture changes. T05 and also the EL-P and EL-S are at their end and "bottom out".
And to all of this "Vega, Hexer, Barracuda, Genius" are slippery when wet: I've the opinion that at that time when those type of rubbers were released, everybody was used to either Tenergy or still tuned or speed glued "softer" rubbers. All this "ball is slipping off" is in my opinion wrong technique. Today, when something like this "slipping" occurs, everybody is saying "OK, I lack in technique, speed and power from the ground" and not "it's the fault of the rubber".
For Xiom rubbers or general:
1. Try to play the hardest rubber you can and go gradually up until you're comfortable to play something around 47.5 degrees
2. Look also for the pimples! I for myself like wide/broad pimples with less space between them for fh and thinner pimples with more space between them on bh. This is still the principle of T05 vs. T64 and it still works for me. T05=Harder feel, higher arc/throw, more spin, less speed, shorter throw and for T64 vice versa. Quite good examples are nowadays R-Series for "Rotation" which means T05 type and V for "Velocity" which means T64 type from Andro.
3. Look for the catalogue from Xiom on their website . You can say more or less the following: O4 higher arc, shorter throw - O5 in between - O7 lower arc, longer throw. I played the O5 Tour which I would see as in the middle between MX-P and MX-S. I also tried the O5 Pro which was more like a MX-P with a higher throw and a little less catapult.
Vega Pro is a classic for me, everybody can play it and it is really cheap. Asia DF was way softer than the 42.5 would suggest and this is a motive: Everything with Dynamic friction plays softer. Vega X is from pimple structure more T64 type and quite easy to play. You don't have to put all effort in to get something out. It also is quite easy to get to the end of the capabilities with this rubber. Andro Hexer Powergrip is more or less a Vega X with a little bit more catapult, which makes it a little bit better for my bh.
4. Everything has to be considered with your blade! O5 Tour is on a fiberreinforced blade with enough stiffness a joy to play, Vega X on a not so stiff and soft all-wood and vice versa.