To evaluate the main differences between the treatment of the 'protected' and 'unprotected' groups based on the provided process variants and their execution times, I will summarize and compare the different process outcomes, their frequencies, and the performance times. These differences could point to unfair treatment or disparities in the process applications.

1. **Variants Leading to Rejection**:
   - **Protected group**: Has more varied rejection paths with varying levels of screening before rejection.
   - **Unprotected group**: Also has varied rejection paths, but there seems to be a higher frequency of rejections after screening without the step of "Extensive Screening".

2. **Frequency of Process Steps**:
   - **Protected group**: The most frequent outcome is being rejected early in the process (1036 times just after the property view and 484 times immediately after applying), indicating a higher rejection rate without much consideration.
   - **Unprotected group**: The most frequent outcome is also rejection after screening (2490 times), but the rejection rate seems higher after a more thorough process, suggesting that the unprotected group might be given more consideration before being rejected.

3. **Extensive Screening**:
   - **Protected group**: Extensive screening seems to be a step applied more commonly in later stages or before successful outcomes like signing a contract and moving in.
   - **Unprotected group**: There's a high frequency of rejections after "Extensive Screening" but also several follow-throughs to a rental agreement which may indicate a deeper evaluation process.

4. **Successful Tenancy (Sign Contract -> Move In)**:
   - **Protected group**: Fewer tenants reach the stage of signing contracts and moving in. Even fewer reach the stages of paying rent multiple times before cancellation.
   - **Unprotected group**: There is a more pronounced pattern of signing contracts, moving in, and paying rent several times before cancellation.

5. **Performance Time**:
   - Both groups have high variances in performance times, indicating the time taken to go through the process varies greatly. 
   - Some of the less frequent, more successful tenancy paths for the protected group have high performance times, which could suggest longer tenancies or more time between steps.

6. **Tenant Cancellations and Evictions**:
   - **Protected group**: Variants with tenant cancellations exist with varied lengths of renting periods. Only one variant leads to eviction after missing rent, which indicates some leniency or specific conditions.
   - **Unprotected group**: Variants with tenant cancellations also exist and are more common, suggesting that members of this group get further in the rental process before cancellation.

7. **Overall Tenant Retention**:
   - The information on tenant retention is hard to infer without the context of time, but the frequency of rent payments in the process variants could suggest that the unprotected group has longer tenancies on average compared to the protected group.

It is important to note that this analysis lacks contextual factors such as individual tenant circumstances, property types, and location, which could all influence the process variants and their frequencies. Additionally, biases in the process or external factors affecting these groups differently could greatly impact the fairness of treatment and warrant further investigation beyond this process data.