Tetratec Filter Choice

[The Duke]

I am in the process of changing the internal filter in my juwel trigon 190 to an external filter. The tetratec range seem good value for money. My question is should I go for the tetratec 700 or spend a bit extra on the 1200 which is for aquariums upto 500 litres. Would this be too powerful for a 190 litre aquarium?