In an earlier contribution to this discussion,

Are you asking "what is the difference between a V70 and an S70?"?

If so, a V70 is an estate car (wagon in US parlance) and an S70 is a saloon
car (sedan).

Or isn't that what you meant? If you're asking about engine/transmission
variants and trim levels, you need to be a lot more explicit.

Well, the V70 has a large verticla rear door covering a large open box
shpaed area  behind the passenger seat.  The S70 has a smaller
horizontal trunk lid covering a smaller boxy storage area.
Consqeuently the  body and lights are configured very differently.

Since those differences are obvious to most  people I'm really not
sure that you are asking the right question.

1998 S70/V70/C70: Designers and engineers have given the 850 model a
thorough revamp, adding power, safety, comfort, and a dash of styling
pizzazz to an already fine automobile. The cars are renamed: S70 is the
sedan, and V70 is the wagon. The redesign includes a new nose,
body-color trim, stronger side-impact protection, more powerful turbo
engines, redesigned interior, and revised suspension. All-wheel drive
wagons arrive to battle luxury SUVs and the hot-selling Subaru Legacy.
Volvo performs a slam-dunk with its first new coupe in years; the
convertible is somewhat less thrilling. Modeled on the S70 chassis, the
C70 shares sheetmetal with the S70 from the windshield forward, and is
powered by the same set of turbocharged powerplants.

1999 S70/V70/C70: Volvo's first all-wheel drive sedan debuts, vehicle
options and color choices have been simplified. Volvo offers a light
pressure turbocharged engine in the coupe to entice consumers looking
for a lower-priced ticket.

1999 S80: The larger more luxurious S80 makes its debut. This long
overdue redesign of the S90 counts several firsts to its credit: first
with a transverse inline six, first with fully integrated GSM phone,
first to carry an environmental specification and the S80 boasts the
world's smallest manual transmission.

2000 S70/V70/V70XC: Engine improvements, a new transmission, and
equipment upgrades constitute the changes for the 2000 Volvos. The V70
AWD and V70 T-5 were discontinued. The V70XC became the only AWD.

2001 S60: The S60 is Volvo's new sedan that takes the place of the
discontinued S70 Sedan. Smaller than the S80 but bigger than the S40,
Volvo has designed the S60 to be sporty as well as safe. Like the Audi
A4 or BMW 3 Series, it should appeal to drivers who are looking for a
sedan that is fun to drive.