If returns are your sole concern, UITFs and MFs normally give "same" results.
I quoted "same" since the returns are more or less at the same range.
Regardless if its a MF or UITF, better look at the historical performance of the funds. It will more or less give you the idea how it will perform in the future.
Though it's true that past performances are not indicators of future results, sometimes it is a factor especially if a certain fund keeps and doesn't make adjustments to its fund management roster.