You mentioned a 7 year warranty, I assume you are in Ontario and covered under the ONHWP or Tarion?
Anyways, if that is true, you need to consider winter when making your decision.
Durock Allfacing in Woodbridge makes products that compliment the EIFS stucco that are meant for your porch and stairs, they have freeze thaw capabilties. Stone has worked well in winter but could be costly to complete. And for the tile, exterior tile can be tough in winter with so much freeze thaw, expansion and contraction of the soils, etc. Salt is another killer for these items, becareful in salting the ice in the winter.