Gyokki 玉輝 is a variety of Tamakongou 玉金剛. Leaves are thicker than Tamakongou 玉金剛. Great looking plant even in small stage.
Senzai 千載 is a small variety in Mame-ba (bean leaf variety) and very popular. It looks similar to Kuroshinju 黒真珠, which is considered the smallest bean leaf. The difference between these two varieties are flower, stem, and size.