I'm in corporate recruitment for a Fortune 100 company (and a fairly conservative "old school" client-facing one at that) and an executive myself. Unless your prospective employer's industry is fashion, where clothing/accessories can dictate a hiring decision, I recommend you go with the bag you feel best matches your outfit and makes you feel comfortable and confident.
In all my years in corporate recruitment and HR at this company and several others, I never once heard an interviewer comment about a candidate's clothing or accessories
UNLESS the candidate's attire and/or accessories were completely inappropriate for the company's corporate culture.
If you look professional and match what they see around them every day (presumably most women in your prospective employer's office carry a handbag of some sort), most hiring managers/interviewers do not recall details of a candidate's attire or accessories in their interview documentation or debrief with a recruiter or anyone else. (I do notice handbags but that's cuz I'm a crazed purse fan! But I still would never say no to a candidate simply because I didn't like her bag).
If any executives I worked with said "well, I do not want to hire her because I didn't like her bag", I'd honestly be like
and then tell him that doesn't play into a hiring decision and drive the conversation to focus on the interviewer's assessment of the candidate's qualifications, skills and experience - and the hiring decision based on this.
Don't stress and GOOD LUCK with your interview!!!!
Knock their socks off and come back to let us know how it went, if you got the job, and what bag you decided on!