I've never used or even seen any Toptul, so i cant comment on them, but i must say i absolutely despise Teng.
Somehow they'va managed to get a reputation as quality tools, especially in Australia, New Zealand and the UK, but unless they have another line that i've never seen i just dont understand the appeal.
An example - A guy at work asks me if i could show him how to lube a ratchet - no problem, we set to work on his Teng ratchet. When i pull it open what do i see? PLASTIC. Ok, its not the gear or anything, but to me, there shouldn't be any plastic anywhere near the guts of a ratchet, period. We lube it anyway and carefully put it back together, and as soon as he uses it it starts auto-reversing. I pull it apart again, checked there was nothing missing, checked everything was where it should be, put it back together again. Still no joy, the ratchet never worked properly again. I accept that i was the one who disassembled and reassembled the tool, and it could be my fault, but i couldn't see anything wrong with the tool - except it was a cheap, nasty, plasticy piece of c**p. I hate Teng