Hi,
“Old recording engine” is not available in the latest LoadRunner versions since we have better recording methods like “proxy recording” now. For more information about proxy recording which is available starting from LoadRunner 11.52, please review:
“Old recording engine” also was some kind of “proxy recording” with “just in time” script generation and multiple limitations.
Actually the recording method affect the application under test behavior under recording and the “script content” (captured events).It may be difference in the counter on the recording toolbar (that means amount of lines in the recording log ). But all the relevant traffic will be “converted” to API calls.
Once the script is created (disregarding the recording method or just manual coding), the replay depends only on Run-Time settings.
Kind regards,