The mini sport ones may well work okay BUT they aren't to original design and specifications of rubber, therefore are a total gamble on if they'll give the correct ride or not.
With no wish whatsoever to open the can of worms with the usual Mspares/Msport debate, I’ve Owned a new 1275gt bought in 80 and owned for ten years all original and then a 75 1275gt with all new suspension and rubbers with the Msport cones there was no significant difference in the ride they were both sort of just about ok with the imo awful original shock absorbers fitted. In 2019 I fitted the kyb gas adjust shocks all round which did significantly transform the ride a marked degree and saved my ailing back. So having driven on both types of cones I would say fit either type but buy some decent shock absorbers as well,
How many mini owners today would you say have any idea of what the correct mini ride is like?
My guess would not be very many people. I must mention driving the new old mini in 2018 after 28years and being shocked at what a spine jolting, deafening, death trap (by todays standards) they are, but I bloody well love driving the thing around and is one of the best things I’ve ever done!