I am just wondering if Mechanical Engineering is better to pursue in college or Mechanical Engineering Tech (MET)? what is the career prospect? any huge different in pay, job description? any Phd in MET also?
If there is no difference how come there is no MET degree from the Ivy schools or top engineering schools?..here is a video I stumbled upon regarding MET: https://www.youtube.com/watch?v=ik7wly_aCLc
It depends on your career goals. Neither is “better” assuming they are aligned with your career goals. There is a difference between ME and MET, though. They are not the same thing. MET (and other ET degrees) require and use less mathematics than their more traditional “E” counterparts and generally spend a lot less time on theory and more time on applications. They are more geared toward the sorts of jobs that spend more time on the plant floor rather than in the design process, though there is certainly some crossover.
Google is a wonderful thing…
http://work.chron.com/difference-between-mechanical-engineering-mechanical-engineering-technology-26254.html
We can’t tell you which is a better path.,. it depends on your interests and aptitude. Per this article, the MET average pay is much lower than ME. However, keep in ind that often salary differences depend on geography / cost of living variables,
Hmmm… I can’t envision an MET Phd (Phd are typically very research oriented). Now it’s your turn to check on Google to know for sure 
Yeah I am not sure I know of any PhDs in MET. I would imagine the courses are taught primarily by those who hold a PhD in ME and whose careers and/or interests have vectored more toward the applied side of things. A (very) brief search of one ET program I know of seems to confirm this.
Part of the salary difference likely comes from the fact that the average ET is more likely to be working in regions that feature more heavy industry, which often have a lower cost of living than the national average. Still, comparing only within the same geographical area would still show a salary difference, in large part due to the average ET role being one that simply commands less salary than the average traditional engineering role.
If you can hack it, ME is preferable over a MET. However, MET is preferable over no degree at all, or even worse, a degree in art history.
You can get employed with a MET but there is a stigma associated with that degree and your options may be limited. I have one and have done extraordinarily well in my career but the first couple years was more tough than I wanted.
As far as post-bachelor’s education, I went back to school and got my MS in Mechanical Engineering (not MET). It required I completed many of the core courses at the ME level (Calculus for Engineers, Physics for Engineers, etc).