With matplotlib, I can make a histogram with two datasets on one plot (one next to the other, not overlay).
import matplotlib.pyplot as plt
import random
x
If I understand you correctly you may want to try something this:
fig, ax = plt.subplots()
for a in [x, y]:
sns.distplot(a, bins=range(1, 110, 10), ax=ax, kde=False)
ax.set_xlim([0, 100])
Which should yield a plot like this:
UPDATE:
Looks like you want 'seaborn look' rather than seaborn plotting functionality. For this you only need to:
import seaborn as sns
plt.hist([x, y], color=['r','b'], alpha=0.5)
Which will produce: