R-M417 is the most prolific lineage of R-M198, which is the most prolific lineage of R-M459, itself the most prolific lineage of R1a.
From 6600-3400 BC this lineage was a bottleneck, meaning all descendants alive today descend from the last son who lived in 3400 BC. All M417 have the same 32 mutations inherited from the men who lived during the bottleneck.
Since R-Z645 is much more widely distributed, let's examine the distribution of its subclades.
Much of the Z93 in Europe appears to be a later back-migration from lineage Z94>Z2124. This is why the origin for Z93 is computed further to the east.
The PhyloGeographer haplogroup visualization mode cannot generate a color coded subclade distrbution of Z2124 at this time because its formation date (2800 BC) is identical to parent Z94.
It will be interesting to revisit Z2124, along with its upstream branches, as we integrate more ancient DNA samples into PhyloGeographer and as the YFull tree resolution increases.