The Assistant State Attorney assigned to your case is unlikely to offer you pre-trial diversion for your new charge because it has already been offered to you for your prior case.
Instead, you can probably expect to be offered a withhold of adjudication with either a specified term of probation where you will need to report to a probation officer on a monthly basis and successfully complete some sort of theft course or simply a withhold of adjudication with no probation.
There is a chance that you may be offered an adjudication, which means that you cannot truthfully answer "No" when asked by a potential employer if you have every been convicted of a crime. Apart from jail, this is the least attractive outcome for your case because it can affect you in the future.
I would agree with Mr. Caldarone's answer. Unless there is something significant that you have left out, you are likely to be offered probation. I also add that a conviction could impact on your future employment opportunities. This is a crime where a conviction could be used to impeach your credibility should you ever have to testify in court. Additionally, this is a crime that can be enhanced to a first degree misdemeanor for a second conviction and to a felony for a third conviction.