Both IR shots look great to me... Were you disappointed the composition on the metal gate suffered where it disappeared against the black sky? Still it looks great but that is about the only thing I see "wrong". You can fix that next time with a little awareness of what's going to happen based on your results here.
Sharpness isn't one of the things I look for in IR. I love the crisp black water and skies and white plantlife - looks like you got that.