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Varieties with a similar appearance
Kastor
| Characters compared | Value |
| Maturity: | Intermediate |
| Growth habit: | Erect |
| Foliage cover: | Good |
| Flower colour: | Red violet |
| Flower frequency: | Occasional |
| Berries: | Very rare |
| Light sprout colour: | Pink |
| Tuber skin colour: | Red |
| Primary tuber flesh colour: | Light yellow |
| Tuber shape: | Oval to round |
| Tuber eye depth: | Medium |
| Tuber skin texture: | Intermediate |
| Variety | Characters matched | Sources |
| Kastor | 12/12 | 1 |
| Desiree | 10/12 | 9 |
| Bartina | 9/12 | 4 |
| Prevalent | 9/12 | 3 |
| Burmania | 9/12 | 3 |
| Xenia | 9/12 | 2 |
| Daresa | 9/12 | 2 |
| Hermes | 8/12 | 5 |
| Kondor | 8/12 | 4 |
| Thomana | 8/12 | 3 |
| Rode Star | 8/12 | 3 |
| Linzer Starke | 8/12 | 3 |
| Kuroda | 8/12 | 3 |
| Hercules | 8/12 | 3 |
| Brunella | 8/12 | 2 |
| Vita | 8/12 | 2 |
| Veto | 8/12 | 2 |
| Pavo | 8/12 | 2 |
| Lovaszpatonai Rozsagyongye | 8/12 | 2 |
| Galina | 8/12 | 2 |
| Briljant | 8/12 | 2 |
| Tewadi | 8/12 | 1 |
| Procura | 8/12 | 1 |
| Speisegold | 8/12 | 1 |
| Escort | 7/12 | 6 |
| Cardinal (1972) | 7/12 | 6 |
| Saturna | 7/12 | 6 |
| Cara | 7/12 | 5 |
| Linzer Rose | 7/12 | 5 |
| Sirtema | 7/12 | 5 |
| Draga (1970) | 7/12 | 5 |
| Red Pontiac | 7/12 | 4 |
| Great Scot | 7/12 | 4 |
| Arka | 7/12 | 4 |
| Lady Rosetta | 7/12 | 4 |
| Atlantic | 7/12 | 4 |
| Producent | 7/12 | 4 |
| Arran Banner | 7/12 | 4 |
| Sante | 7/12 | 4 |
| Podzola | 7/12 | 3 |
| Hydra | 7/12 | 3 |
| Minerva | 7/12 | 3 |
| Colmo | 7/12 | 3 |
| Eigenheimer | 7/12 | 3 |
| Furore | 7/12 | 3 |
| Green Mountain | 7/12 | 3 |
| Istok | 7/12 | 3 |
| Nora | 7/12 | 3 |
| Sabina (1976) | 7/12 | 3 |
| Tasso | 7/12 | 3 |
| Uran | 7/12 | 3 |
| Petra | 7/12 | 2 |
| Arjan | 7/12 | 2 |
| Condor | 7/12 | 2 |
| Bliza | 7/12 | 2 |
| Diana (NLD) | 7/12 | 2 |
| Ajiba | 7/12 | 2 |
| Robinta | 7/12 | 2 |
| Cynia | 7/12 | 2 |
| Stemster | 7/12 | 2 |
| Erna | 7/12 | 2 |
| Dark Red Norland | 7/12 | 2 |
| Kolpashevsky | 7/12 | 2 |
| Gineke | 7/12 | 2 |
| Kemenyito Kiraly | 7/12 | 2 |
| Libertas | 7/12 | 2 |
| Santana | 7/12 | 2 |
| Amalfy | 7/12 | 2 |
| Romina | 7/12 | 2 |
| Cobra | 7/12 | 2 |
| Sangre | 7/12 | 2 |
| Delcora | 7/12 | 2 |
| Donald | 7/12 | 2 |
| Ulster Glade | 7/12 | 2 |
| Priska | 7/12 | 2 |
| Deodara | 7/12 | 2 |
| Redstar | 7/12 | 2 |
| Advira | 7/12 | 2 |
| Meise | 7/12 | 2 |
| Dryf | 7/12 | 2 |
| Freika | 7/12 | 2 |
| Pruceres | 7/12 | 2 |
| Dalia | 7/12 | 2 |
| Redbad | 7/12 | 2 |
| Heiko | 7/12 | 1 |
| Rosva | 7/12 | 1 |
| Emergo | 7/12 | 1 |
| Sinora | 7/12 | 1 |
| Angelika | 7/12 | 1 |
| Leona | 7/12 | 1 |
| Toni | 7/12 | 1 |
| Honoree | 7/12 | 1 |
| Friar | 7/12 | 1 |
| Carnea | 7/12 | 1 |
| Vekaro | 7/12 | 1 |
| Rieke | 7/12 | 1 |
| Suevia | 7/12 | 1 |
| Kimberley | 7/12 | 1 |
| Amber | 7/12 | 1 |
| Posmo | 7/12 | 1 |
