I've had the Juwel 60 for a little over a year now and am very pleased with it. Basically, the Juwel filters do fine for the sort of thing I do: planted tanks, fairly lightly stocked. When my stocking levels started rising, I added an extra external, rather than taking the Juwel out; that way, I've got a bit of backup if something happens to the filter when I'm away. But I ran it for a year with just eh Juwel filter (normal stocking- 1 inch/gallon sort of proportions) with absolutely no problems. If you intend to keep very messy fish, you may want a stronger filter.
No experience of the other tank, I'm afraid.