My total "guesstimate" would be, better bottom end and mid to upper mid-range, and depending on how high you're trying to turn it, you may not have enough open spring pressure to maintain full control of the valvetrain up top.
The UD cam has a much faster rate lobe profile, and will be more of a challenge to control up high.

.393 lobe lift in 276deg vs .406 lobe lift in 267deg.

It likely has a peakier/pointier nose radius too, which would make it more prone to wear....... and you might be able to visually see that by eye.