Both are as much similar to each other as common basis in both used to be 'employed' in an organisation. Service Certificate used to be a simple one, many look like a format with logo address of the office like a letter head, standard basic information, may be or may not be serially numbered such as, Name of employee/Employee No., designation at the time of leaving, date of joining, date of leaving, reason for leaving, some may indicate 'last pay drawn' and his 'remarks' where his/her service was .........(poor, average, good, very good, excellent, outstanding or satisfactory) like what grading we find in the school leaving certificate, signed with seal, date of issue. A duplicate copy of the same is retained at office.
Whereas 'Experience Certificate' used to be little more elaborate, something like descriptive mentioning his/her career growth, positions held, knowledge acquired, assignments handled, his contribution to the organisation, achievements etc. This format not used to be like the other one. Generally dictated/typed in sentences of choice of the issuer. This may be selectively issued to 'go-getters' wishing all the best. Shrewd employees should periodically obtain such certificates whenever his/her bosses with whom they were friendly/close/got along leave the organisation for the period covering their tenure under them. Such certificates serves handy whenever & wherever opportunities are pursued for further growth in their career.
Both the certificates, it's better to obtain them before one leaves. Chasing after leaving and after elapse of years really difficult that too from seniors with whom relationships was not that cordial extremely tough or not possible.
16th March 2019 From India, Bangalore