Both versions share the same ISO boundary dimensions (35 x 62 x 14 mm), so the shaft and housing do not change. What changes is the seal, and with it the permissible speed. All figures below come from RAYSDE published model pages; confirm the final choice against your operating conditions.
A: Yes. Both have a 35 mm bore, 62 mm outside diameter and 14 mm width, with Cr 17.6 kN and Cor 10.3 kN. They are mechanically interchangeable; the difference is protection and speed.
A: The open 6007 is rated 13000 r/min with grease lubrication (15000 r/min with oil), while the contact-sealed version is rated 6700 r/min - about a 48% reduction. Contact seals add friction and heat, so a sealed bearing must not replace an open one in a high-speed position.
A: Choose contact seals for dust, moisture or maintenance-free duty; choose the open type for high speed, oil lubrication or scheduled re-greasing. Before any substitution, verify load ratings, internal clearance and sealing type against the real operating conditions. RAYSDE supplies both versions as a bearing supplier and OEM partner.