Hi Tiep,
Here is the mapping between the two methods:
| Bulk | REST | |
| EmailOpen | emailOpen | |
| EmailClickthrough | emailClickThrough | |
| EmailSend | emailSend | |
| Subscribe | emailSubscribe | |
| Unsubscribe | emailUnsubscribe | |
| Bounceback | ||
| WebVisit | WebVisit | |
| PageView | ||
| FormSubmit | formSubmit | |
| campaignMembership |
PageView is a list of all URL's visited. This is different than WebVisit, where URLs that are part of a single visit are grouped together.
Bounceback is an activity that indicates a bounceback event, whether a hard or soft bounce.
campaignMembership was not removed from the bulk API, rather it has yet to be added.
Please note that at this time, there is no intention to have these match identically. Each has specific use cases to meet, hence the differences.