I've recently changed the brake pads of my Sprint from EBC GreenStuff to Mintex M1144, both easily obtainable though Motorshop parts suppliers or ebay.
EBC GreenStuff: https://www.ebay.co.uk/itm/EBC-GreenStu ... :rk:1:pf:0
Mintex M1144: https://www.ebay.co.uk/itm/MGB535-M1144 ... :rk:1:pf:0
I've found that the GreenStuff had a very good initial "bite" but when braking longer and from higher speeds, couldn't quite keep up. I had them overheat once with loss of braking efficiency. Pedal feel is difficult to describe, but I would call a bit cushioned. The adds say no brake dust, but this wasn't so with my Sprint. It's easily cleanable though.
The Mintex M1144 compound is the first Motorsport upgrade from standard pad material (they have MGB535 pads in standard, M1144, M1155 and M1166 compound). With these M1144 pads, the initial bite is comparable with the GreenStuff, but the pads keep up with heavier braking and temperatures. The general feel is a bit harsher than the GreenStuff, giving a more robust pedal feel with a bit more "grinding" noise from the discs, sometimes brake squeal and also a bit more black dust on your wheels.
In conclusion, I'm happier with the Mintex M1144 pads and would consider this one of the best options for weekend/sporty driving if using standard discs.
All the best!