Aren't they completely different?The one that Rukia saw from Ichigo,is way different from what Inoue have seen from him,right?It's normal that they have a different interpretation with his expression,simply because they are completely different.
Now.let's compare that look that Rukia saw from Ichigo after being healed by Inoue,to the kind of look that he gave while Inoue was still lying in a futon...