Is there really a difference between the two terms? Ask her what the difference is, if any. From my understanding, once you start working using the TPS associated EAD, your DSO terminates your SEVIS. If/when TPS expires and you still haven't acquired a different status (H1, GC,etc), you'll have to go to Nepal and apply for a visa, like you did the first time.

Just curious - when was your TPS approved? I applied mid September, EAD came over a month ago, but TPS case status is still showing "Fingerprint Fee Received".