Although I have not grown Bursa, I have sampled some from FmGrowit. It seems to have a distinct floral aroma.
The aroma of the Bitlis from
www.WholeLeafTobacco.com I would describe as similar to the distinctive "Turkish" aroma associated with Camel cigarettes.
Samsun is a bit stronger in flavor and intensity, slightly sweet, and also offers the "Turkish" aroma. Bafra comes across as a somewhat milder and subtler version of Samsun. Likewise with Samsun-Maden. All three are from the Samsun district of Turkey, as is Samsun-Canik. Trabzon is said to be derived from Samsun seed, and is reportedly much stronger.
My Izmir-Ozbas is described in a separate thread:
http://fairtradetobacco.com/showthread.php?669-Rare-Turkish-Ootz-Cigar.
Xanthi-Yaka 18A (Yenidje leaf) can only be described as subtle and delicate. Its unique, lightly floral aroma is what gave the now extinct Balkan Sobranie White its unmatchable flavor. Xanthi-Yaka is a poor burner, and performs best when no more than 10 to 25% is included in a pipe blend. The Yenidje aroma shows though a blend that includes as much as 25% Latakia.
For all of these, leaving the plants un-topped produces milder, subtler leaf, with less floral intensity. Planting them closely (e.g. ~1 sq. ft. per plant) also produces more subtle--and smaller--leaf. These two practices lead to the opinion that Turkish tobacco is the mildest and most subtle of all tobaccos. When widely spaced, topped, and well fertilized, the leaf is significantly larger, but can become harsh, though not as strong as burley.
Currently, I am also growing Balikesir, Mutki, Smyrna #9, Tasoua and Yayladag. Of these, only the Tasoua shows a petiolated leaf (stem separating the leaf from the stalk, also know as basi bali or bashi bagli) like Samsun and its relatives. The others, with the exception of Mutki, appear to be basma types. Smyrna #9 produces the largest of the basma type leaf that I have grown in the past. Interestingly, the Mutki is putting out even larger leaves, and may represent a cross with a burley or a Spanish type (e.g. Comstock and Havana). If the Mutki smells and tastes "Turkish," then it may turn out to yield more Turkish leaf than all the others. I believe Ottoman is also a cross, perhaps with a burley.
I had seed for Celikhan, but it failed to germinate in several attempts. All of the others that I am growing should have seed available in the seed bank for next year.
Bob