Winstrol is better in comestic enchancement
Acts on glucocorticoid receptors to reduce mineral retention more so then Mast, and will give your skin a thinner appearance. However it can turn your ligaments and tendons to glass, accompanied by stronger contractile force that winstrol provides. If you use it for 4 weeks at a low dose of let’s say 30-40mg a week, it will in my opinion create a better appearance. It will reduce aldosterone excretion from the kidneys so you will hold less mineral and water retention. Both extracellular and intracellular.
Masteron is more of a SERM, stopping e2 from binding to EB2Rs and negating side effects from E2. From this it will cause some mineral loss, no where near as much as Winstrol. It will provide some anabolic benefit in the sense of retaining muscle through being a DHT.
Winstrol
Will come on harder and quicker
Mast will take some time to build up in blood serum even if propinate ester is deployed.
If you can, use both however what your lipid profile and keep water and mineral intake high especially during workouts.