Nothing stopping you from finding out for yourself.
Go to any of the decent white goods spares sup0pliers and look up the belts for the 2 machines.
If the same part is offered for both, they will be interchangeable.
http://www.espares.co.uk/search/mo434633pt1589/tumble-dryers/belts/hotpoint/tdl30n
Type: 7PHE 1860 or 1860PHE7
Section: H7
Belt Type: Poly - Vee belt
Length: 1860 mm
http://www.espares.co.uk/search/mo503972pt1589/tumble-dryers/belts/hotpoint/tl61p
Type: 1894 H7
Section: H7
Length: 1894mm
Not the same length
Anon
October 2016