As noted in the previous article in this series, China Roses had little to no scent. Since they repeat, they are in almost every Hybrid Tea's lineage. Ruining their scent potential. Many are unaware of this because they have never smelled a non-Hybrid Tea rose. The fact that many OGR's are hybrids in some way also has another problem and that is ability to take either the cold or heat.
Variants can be on a rose by rose basis.
You can not always rely on all Damask's being able to take the cold wonderfully and so forth. For instance, according to Mr. Martin in his book 100 Old Roses for the American Garden , the Apothecary's Rose, a Gallica of Medieval origins, does wonderfully in the cold but is horrid in very hot climates. Another Gallica, Belle de Crecy does wonderfully in both hot and cold climates. This is why it is important to understand your climate and needs. The first step is to find your zone.