TYM is Korean.
Yanmar is Japan.
Both those models use the Yanmar engines. So it's nearly comparing apples to apples, yet one is the golden delicious and the other a Gala.
TYM at times is lacking on the support side where bringing the machine in for some repair could take many weeks or months, yet with Yanmar its a week to a few weeks.
For 60 years Kujie supplied parts to Yanmar and Yanmar licensed Kujie to build Yanmars in Korea in the large F series models. In the past 5 or so years, TYM acquired Kujie. The 3 companies all work with one another.
TYM is partnered with Yanmar to also make RK (Rural King Tractors). If you live near an RK store, you could find a machine to your liking close by. The RK24 matches the two machines you are interested as well. And it's only $15K. Add a mere $500 and it comes with a CAB !!!! What a deal if you live in the north and move snow !!! Or in the south needing AC. Yes, it has the Yanmar engine.
TRACTORS: RK24 SERIES 'MORE TRACTOR LESS PRICE' Sub-Compact Tractor and toughest in its’ class. Rural King Tractors For Sale.
www.rktractors.com
The Yanmar has the 10 YEAR powertrain warranty too. It even covers the PTO and all the gearing. Now, the SA series is mostly Sub-Compact. Are you certain this is what you are after? The SA series can not use a post hole digger due to the tiny rear wheels. The machine isn't tall enough. Other than issues similar to that, I would lean towards the SA overall.