Any healthy series II engine (C20, C20B, C20J, C20R, C20R+, C20R1, C20R2 and the lonely C20W) should be able to start without modulating the throttle. Hot starts in series II engines are typically from faulty accessories, starter generators or battery conditions. Occasionally in certain circumstances R's and R+'s will require extra attention to avoid a hot start or hung start. In either case, hot starts are painfully expensive and focusing on start ups is financially appropriate.
Non FADEC series III engines such as C30's and the variants are prone to hot starts absent modulation even in the best of situations. In addition, on some models, a fuel check valve helps. Series III engines with FADEC do not have the same problem.
The main reason Bendix is more popular than CECO is simply money. CECO is a lot more expensive to overhaul.