In the first place it is worth pointing out that "albeit of its harmless nature" is an ungramatical phrase. The problem however relates to the use of 'its' rather than 'albeit'. 'Abeit of a harmless nature' would be correct.
The question now seems to be "are 'albeit' and 'although' the same; They are very simlar in the sense that they are both roughly equivalent to 'in spite of the fact that ...', just as 'piss' and 'urine' are similar in their reference but differ in register. 'Although is regularly used in everyday conversation as well as in academc English. 'Abeit' is academic.
I have two further problems with your sentence. The first is a question of style.The use of 'although' in such close proximity to 'albeit' strikes me as repetitious.
Secondly, I think 'however'. makes better sense: i.e instead of 'albeit of a harmless nature' I prefer however harmless in nature; which has a dfferent meaning.
Fred O'Hanlon .
Student or Learner