This is the first year I have both in ground coming out of winter. Both were treated the same (insulated and wrapped with tarp) and side by side on the south wall of the house. The MBVS is 3 year old tree been in ground 1.5 years, the Ginos a 2.5 year old tree been in ground just under a year. Both bore well last year and were trimmed back to about 6.5' for winter.
MBVS: 5-6" of tips dead, rest of plant healthy. Started budding out immediately after uncovering (were swelling covered).
Gino's Bl: 1-3" of tips dead, rest of plant is healthy. Took 3 weeks to start budding out.
Conclusion: at least in my case with my two trees I would call the Ginos more cold hardy as it had less damage and waited longer to bud out, avoiding any late freezes.
