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Negative space around the flower looks a little tight on both.
Stem color looks blue.
Reflections (go figure) are plenty, might selectively clone/heal some of them.
Bottom edge of mono, might crop the thorn out.
Not diggin' the blue reflection highlights in the mono
Nits out of the way, I like the mono version, it showcases the "glass" aspect nicely imo. The color version looks a bit soft and off WB.
Threw a quick color tweak @ highlights, some overlay and some USM, as well as the canvas extension for comparison. You might not want to move the stem color as far as I did and likely use more masking/gradient, but provided for quick illustrative comp. As always, S&P (more or less) to taste.
BTW, I prefer the gradient background to the all white. Curious to how the color on black/charcoal would be as well.