It is my understanding (anyone feel free to correct me) that if the OC is replacing/repairing common property, then the common property has to be repaired/replace to the same standard.
For example – I live in a pre-War building with very nice decorative ceilings. One of those ceilings requires replacement. I have the right to require that the ceiling is replaced like for like, as distinct from it being replaced with a plain ceiling.
In the case of the tiles – this divides into two elements – the standard/quality of the tiles and the appearance of the tiles. If the tiles that the owners corporation is proposing to use are not the same standard/quality as the tiles previously used, or won’t serve the purpose they are meant to, then I believe you can object to that. Appearance is another matter, and that is something you have to negotiate.