The supplex tights are less comfortable than the cotton, but they offer better protection against sweat - perspiration wicks away from your skin. I have the cotton Monaco tights and they are the most comfortable tights I own, very soft and an excellent fit.
If I were you I would be very cautious about the Marcel tights. These were my first choice, but when they arrived they were way too small. So I sent them back across the Atlantic. A month or so later I got a second pair - also too small. This time, I returned them with a note asking for a dancebelt instead. When it arrived it fit perfectly. However, they arrived about 4 months after I had started the process of ordering the Marcel.
I found that the problem lies with the size buttons. The first button is for ready-to-wear sizes, and the default setting is Small. The next three buttons are Waist (default setting 58 cm.), Hip (70 cm.) and Inside Leg (50 cm.). Each time I ordered Large, but each time I got a child's size - waist 58 cm/hip 70/inside leg 50.
If you select one set of size buttons, the other(s) should grey out, but they don't, and the website ignores your actual selection. This is unique to the Marcel tights, it doesn't apply to any other products. Although I sent a letter explaining this to WearMoi, the problem has not been solved.[/i]