Namwah is very generic now, size can be from 6 foot to 30' tall, size of bananas varies, and also the number of bunches can be from 3 - 20. As long as you didn't buy "Dwarf Namwa" you should get something that produces decent floral sweet flavor with vigorous growth and many suckers. Smaller, but not too tightly spaced. It is a decent banana
Gros Michel is a sickly type banana, they prefer to grow very close together to keep stalk from drying out, and need a lot of fertilizer, however they produce very large racks of williams type banana, same as commercial varieites on market as far as taste, (Dole banana) and produce just enough suckers 2-3 per tree, with one nice one to keep. Very susceptible to disease and rot.
Lady finger is not a Thai name, so unless they provided a Thai name you could have got many different types of Thai 'specific' varieties. They likely are selling a sort of 'leb mer' (fingernail) which is smaller than lady finger. The taste is starchy sweet, and the bananas are 'cute' but are very slow growers, produce very few bunches, and produce many suckers but not vigorous spreader.
Long time ago I bought up any and all red banana corms I could find on market, and finally found one that produced small lady finger sized bananas with pink insides, and is the sweetest banana I have ever tasted. Ripening was even and normal, growth vigorous, suckers vigorous, it really is the best banana I have ever seen, and I would likely rename it in the future to avoid confusion with all the huge generic problem of "Gluay Nak" "Gluay Goong" names in Thai. Several other red bananas had the issues of cuban red such as difficulty in ripening, slow growth, starchy flavor, etc.
Other excellent Thai strains include Jackfruit Banana (Gluay Kanoon), Gluay Keeow (green banana). Out of the 20 or so strains I planted, My red, jackfruit, and green bananas are the tops, and still on the fence about which plantains to keep.
Which kinds are you growing now? Thai bananas is a huge hobby for me as far as collecting.
Which variety are they? I have many bananas from Thailand, in future I can send you if you are interested. Probably you can get them in week.
I have Kluai Leb Mu Nang, Kluai khai, kluai Namwah
It was an offer (low price) so i desided to buy them. Varieties : Kluai Namwah, Lady Finger and Gros Michel. You can send me a pm about your varieties.