I am not sure what the significance is, but as I was reading the different sacrifices, I noticed slight differences. But I like to see things side by side, so here is what I have broken down so far. What did HaShem instruct to be the offering acceptable for the different offerings?
"from the herd, male without blemish," (1:3) "bull" (1:5)
"from the flock, from the sheep or goats...male without blemish" (1:10)
offering of birds...turtledoves or pigeons..." (1:14)
fine flour, oil, frankincense. (2:1)
NO leaven or honey (2:11)
"...season all your grain offerings with salt..." (2:13)
if baked in the oven "unleavened loaves of fine flour mixed with oil or unleavened wafers smeared with oil." (2:4)
if baked in a griddle "fine flour unleavened, mixed with oil." (2:5)
if cooked in a pan "fine flour with oil." (2:7)
if it is firstfruits "fresh ears, roasted with fire, crushed new grain" with oil and frankincense.(2:14-15)
"an animal from the herd (bull), male or female... without blemish before the LORD." (3:1)
"an animal from the flock (lamb/goat), male or female...without blemish." (3:6)
Anointed Priest - "a bull from the herd without blemish" (4:3)
Whole congregation - "a bull from the herd" (4:14)
Leader - "a goat, a male without blemish" (4:23)
Common person - "a goat, a female without blemish" (4:28) OR "a female [lamb] without blemish" (4:32)
A person who doesn't speak out as a witness when he should (5:1), touches an unclean thing (5:2), touches human uncleanness (5:3), or utters a rash oath (5:4) and doesn't realize it until it is brought to his attention - "a female from the flock, a lamb or a goat" (5:6) OR "two turtledoves or two pigeons (5:7) " (one for sin offering, one for burnt) OR "a tenth of an ephah of fine flour" with no oil or frankincense*, depending on what he can afford.
Person who "commits a breach of faith and sins unintentionally in any of the holy things of the LORD" (5:15) - "a ram without blemish out of the flock" (5:15)
Person who sins - "a ram without blemish" (5:18) AND "make restitution... and shall add a fifth to it and give it to the priest" (5:16)
[Guilt offering continues in next weeks portion, so I am including it here]
Person who deceives his neighbor "in a matter of deposit or security, or through robbery, or if he has oppressed his neighbor or has found something lost and lied about it (6:2-3) - Must restore in full plus a 5th "what he took by robbery or what he got by oppression or the deposit that was committed to him or the lost thing that he found or anything about which he has sworn falsely... giv[ing] it to him to whom it belongs on the day he realizes his guilt." (6:4-5) AND "a ram without blemish out of the flock" to the priest (6:6).