I haven't done an A/B comparison between the two, but I expect the Marantz will be better. The Technics has STK00xx modules as the output power stage, and they're not that great on sonics compared to all-discrete BJT power stages. OTOH, the Technics has a very nice discrete RIAA phono stage, which is perfect for use with MM cartridges on most Technics or similar turntables. It's also great for modding because of its simplicity (see below).
Capt. Rajesh on this forum had an SU-8022 for sale a few months ago - PM him directly if you can pick it up in Chennai.
Related: I have just finished modding a Technics SU-8011 (same chassis and circuit topology, lower power) with a pair of MyRef RevC monoblocks (LM3886 + LM318) in place of the STK power stage. I also modded the phono stage with high-end film and electrolytic caps (Silver Micas, Wima FKP2, Rifa PHE426, Nichicon Muse and Rubycon Black Gates). The whole thing took nearly 50 hours of work spread over several months, but it was well worth the effort - I'll post pics and an outline of the mods later. The main payoff is the combination of the MyRef RevC with the (upgraded) discrete RIAA phono stage, allowing a single integrated amp to be used directly with almost any turntable, without the need for a phono preamp.