As told by someone, there is no significant difference between two ESC beside of casing material and appereance.
If a Hobbywing120A "update" with the latest "stock profile software", it will have same feature (with turbo function) as Speedpassion GT2.1.
Therefore Speed Passion GT2.1 ProStock + TeamPower 13.5T有感 is more powerful than a "non-turbo" ver.2 Hobbywing 120A + TeamPower 13.5t有感.