The TS Golden bell seedlings are approx. 3 mths. (12 wks.) of age.
The Arabicums & Arabicum TS's do grow much fatter than that of the obesum. Arabicums grow much quicker than TS's. The Arabicum grow horizontally across the soil, where obesum's will grow deeper and taller.
The thing with the Arabicums is that they also are no different starting from seed than that of the obesum. In that they too, do not come true to seed and you are faced with not all seedlings growing as fat and low as you might be hoping.
They still do the culling of seedlings based on their characteristics and whether they fit the bill.
Rick