The difference in prices for the two shown in my 2013 Standard Catalog of Vintage Baseball Cards are interesting...
A regular Kashin common (pgs. 227-8) is listed at $12 in VG, $20 in EX, and $40 in NM.
A 5"x7" Premium common (pgs. 346-7) is listed at $15 in VG, 25 in EX, and $50 in NM.
To me, the prices for the premiums should be a lot higher due to their scarcity when compared to the regular Kashin issue. Maybe things have changed in the last 7 years?
(BTW, the Hornsby premium is only listed at $25 in VG, $45 in EX, and $90 in NM, while the regular Kashin Hornsby is listed at $50 in VG, $85 in EX, and $175 in NM.)