You'd think so, since ultimately they're both trying to achieve the same thing. The impression I get however is that SAMP tries really hard to run down the name of MTA, even though MTA is by far the superior program. I've never seen any MTA-related content or MTA-SAMP comparisons last very long on their forums before being deleted. Probably because the outcome of any such discussion or comparison wouldn't favour SAMP.
If I were you I'd just make the change to MTA permanently.
haha never