I browsed Wikipedia and found out that leadership of the Latvian SSR was predominantly Latvian, not Russian.
While Latvian SSR existed there were 11 Latvian and 3 Russian leaders (chairmen, speakers etc.) - I tell them apart by surnames, so I may be wrong, but only slightly.
Interestingly, all leaders of the Communist party of the Latvian SSR were Latvians exclusively.
I agree that there was political dominance of Moscow and there was no democracy, but Latvian SSR was governed mostly by native Latvians.
So in which respect were Russians more equal than others in the Latvian SSR?
On the other hand, it looks like there was no economic dominance of RSFSR over the rest of SSRs.
Why RSFSR should buy those RAF vans if not to support Lavian SSR's economy? There were enough car making factories in RSFSR, but USSR's leadership strived to improve economies of all the republics, so they encouraged bilateral trade between every two SSRs.