As TS&M said; the Tec 40 and Tec 45 are very closely aligned with AN/DP. Tec 50 gives virtually the same as Extended Range. The idea was to allow better equivalency, allowing cross-overs and further progression. That's why PADI re-formatted their old Tech 1/2 & Tech Deep course structure - to more closely match the popular formats run by other agencies.
When PADI reformatted the 'DSAT Tech Deep' course, it became the 'TecRec' series. No mention of DSAT now. The 'TecRec' program includes 3 'air' courses (Tec40/Tec45/Tec50) and then runs onto Trimix courses. There's also a bunch of rebreather (CCR) courses being introduced, as well as side-mount. If you do the SM course first, you can complete the Tec courses in side-mount rig. Various PADI TecRec instructors have created their own distinctive courses also.
PADI are really promoting the TecRec program with alacrity. Resorts that offer the courses can now be branded as 'TecRec' centres, allowing easy identification. That's very new now. No question about the 'acceptability' of the PADI tec courses - they're being marketed to high hell... just like PADI do with everything, so I doubt they'll remain the 'little boys' for much longer.
JimL: Price should be comparable to equivalent courses with any other agency. The PADI manuals are slightly more expensive, but much better quality (than the hand-copied, plastic spine TDI manuals) and one manual covers all 3 PADI tec deep courses.
To the OP: only way to know if the resort offers the courses for sure, is to contact them.