No. Clarify the difference and its meaning in the actual arrangement.
Resolve the entity question directly
Do not change names merely to make the documents look consistent. Identify which entity employs the applicant and why the records use different names.
The letter should identify the U.S. employer, state that the position is that of an agronomist, describe the professional duties in specific terms, give the expected duration and salary, and confirm the applicant's degree. Gather the offer, duties, citizenship evidence and relevant credentials, together with any immigration history or arrangement that requires closer review. Build the letter around facts the employer can presently confirm: the employing entity, professional duties, compensation, temporary period, supervision, and the method for selecting a site. Corporate formation records resolve employer identity; the signed letter resolves the proposed engagement; transcripts and licences resolve qualifications. Settle the credential question before paying for registry copies, because a qualification that does not match the listed profession will not be rescued by a flawless identity chain, and those copies would then buy nothing.