Yes, all keycodes are the same, they are based off of the ASCII chart that you can pretty much be googled online (all hail our google overlords). Most programmers would use the HEX values and decipher them into binary for commands, but in scirra, im pretty sure they use the decimal value as a way to track the key presses (most likely all in capital letters).
(A:) Dec value = 65, HEX = 41
(B:) Dec value = 66, HEX = 42
If you do not understand how HEX works, instead of just numbers, it goes from 0 - F, meaning it counts down from 0 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F, and so on.