This is always a difficult discussion to have. I know very few people that are proficient in php and .net and therefore have any authority to compare them.

Here in NZ, most Ford drivers argue that they are "better" than Holdens. However, they have probably never driven a Holden.

My point? People get attached to what they know. I am a PHP programmer and I love it. I tend to argue that it is the best language simply on principle - I am defending my decision to use it. Therefore I will always argue that my decision was the right one.

From my observations, proficient programmers will always get the results they need, regardless of the platform they use. The rest is down to personal preferrence.