Tsetse Mossie'd be much, much better than the Hs129. The Tsetse has a speed of 338mph on the deck, 380mph at 13,000ft and an initial climb of about 2,800ftpm. The Hs129 has a top speed of 253mph and an initial climb of about 1,300ftpm.
The Tsetse would also be much easier for HTC to add as 95% of the 3D model is already built.
I'd like to see both, but the Tsetse would be far, far better in the context of the MA.