Mapei vs UltraTileFix grout for outdoor patio?

[ashthekid]

So I've been convinced to use a solid grout rather than permeable brush in variety.

 

Now it's down to which brand is better?

Mapei's Ultracolor or UltraTileFix ProGrout Flexible grout?

 

I'm after limestone colour which is seems is quite difficult to get in Mapei as I think they are discontinuing it but can still get hold of some on a few websites.

But what brand is going to stand the test of time or is there really not much in it?

[nod]

Mapei is probably the most popular and best 

[ashthekid]

Ended up using Weber which looks smooth and very nice so far. 
In a lovely Limestone colour too which Mapei had discontinued for some reason.