Which QT tank should I use?

[chrissreef]

Picking up a 3" Tomini tang tonight from someone's tank breakdown

I have 2 QT tanks set up...

30g with 4 baby clowns (still eating Cyclopeeze .5"-1" range)
55g with 4" PBT with copper

I eventually want to put both tangs in my 300g reef, but which would cause the least amount of stress to the Tomini? (or clowns)

Thanks!