How resilient do you think the radials would be against the field ack in AH? In the mossie, it just has to go within visual range of the field and the radiator will be hit.
27 Squadron which operated Beaus in the CBI were given some Mossies for testing in combat conditions.
It was slightly faster on the deck but had less firepower then the Beau with 4 303s vs 6 to go with the 4 20mm. Quoting David Innes, a Beau driver with 27 Squadron.
"The first reaction of Beaufighter crews at Agartala was one of reservation, for the Mossie did not seem to have the airframe strength desirable for low level attacks where there was always the risk of aircraft hitting objects such as trees during attacks."
"Three other aircraft had lucky escapes. Sgt Gunn hit a tree at Pyawbwe, causing extensive damage to the starboard wing. F/O Hassel hit unseen trip wires at Gwa Bay which damaged the port undercarriage door, the exhaust and airscrew, while Sgt. Hartness 'collected' an iron rod that was protruding from the top of a pagoda, which wrapped itself around the port wing, and effectively locked the aileron. All three aircraft were flown back to Agartala and the fact they had been rather badly damaged indicates how tough were the Beaufighters. One could only surmise what would have happend if the aircraft had been Mosquitos."
So at least in the low level ground attack role the Beau's were flying, there seemed to be some concerns.