Comparison With Gemini
After the first-generation spacecraft Vostok and Mercury had proved the technical feasibility of manned spaceflight, NASA proceeded to build its second-generation capsule, Gemini, which was a completely new design which retained the successful features of Mercury such as the conical shape with a heat shield at the bottom while adding several new features for example engines strong enough to significantly alter orbit, docking and rendezvous facilities, and provisions for EVA, all of which were essential for practical applications of spaceflight, namely a manned Moon mission.
In comparison to that, Voskhod capsules were simply modified Vostok craft, retaining most of Vostok's limitations. In the end, Voskhod turned out to be a dead end and was abandoned after only two manned missions. It was superseded by the much more capable Soyuz spacecraft.
Read more about this topic: Voskhod Programme
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“When we reflect on our past sentiments and affections, our thought is a faithful mirror, and copies its objects truly; but the colours which it employs are faint and dull, in comparison of those in which our original perceptions were clothed.”
—David Hume (1711–1776)