Irwin vs Dewalt drill bits

[NicKarla]

Looking at a set of masonry drill bits and wondering what would be better;

These Dewalts seem to be most people default choice at only £9.99 from SF.

http://www.screwfix.com/p/dewalt-extreme-2-masonry-drill-bit-set-5pcs/88598


However these have caught my eye from Irwin for pretty much the same money. Does 'suitable' for granite mean its harder/better?

https://www.amazon.co.uk/Irwin-10501918-Granite-Drill-Pieces/dp/B001V2WRZ2/ref=cm_cd_al_qh_dp_t

 

[SammyInnit]

Probably out of the same factory. Same company in a round about way. Never much in it with masonry bits.

 

[chappers]

granite bits normally have a flatter cutting edge

 

[NicKarla]

Would the granite bits be as good for other masonry materials as well as granite, while the Dewalt ones would only be good for your usual brick, concrete etc?

I.e. The Irwins offer greater flexibility?