[Closed] Travel adjust forks..... Brilliant or compromised?

Hi all,
I'm considering a pair of travel adjust Talas forks 120-150 for my wife's hard tail Ragley. (Vicky Pea) 120 for general trail riding and 150 to be used for the rocky descents and this summers Alps trip. She's 5'6" so 120mm would be a good trail riding length for her.
My question is, are the forks absolutely as good in each setting as a 120 or 150 fork or have some compromises had to be made and she's better off with a fixed travel fork. Is the compromise in the weight?

Thanks in advance
Floss